Finalize perldelta for 5.29.4v5.29.4

1 files changed, 55 insertions, 309 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 079f298523..fb24ee53a4 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,9 +2,6 @@
 
 =head1 NAME
 
-[ this is a template for a new perldelta file.  Any text flagged as XXX needs
-to be processed before release. ]
-
 perldelta - what is new for perl v5.29.4
 
 =head1 DESCRIPTION
@@ -15,42 +12,16 @@ release.
 If you are upgrading from an earlier release such as 5.29.2, first read
 L<perl5293delta>, which describes differences between 5.29.2 and 5.29.3.
 
-=head1 Notice
-
-XXX Any important notices here
-
 =head1 Core Enhancements
 
-XXX New core language features go here.  Summarize user-visible core language
-enhancements.  Particularly prominent performance optimisations could go
-here, but most should go in the L</Performance Enhancements> section.
-
-[ List each enhancement as a =head2 entry ]
-
 =head2 The maximum number of times a pattern can match has been doubled
 to 65535
 
 This means if you specify C<qr/a+/> that there can be anywhere from 1
 through 65535 C<"a">'s in a row, instead of 32267 as previously.
 
-=head1 Security
-
-XXX Any security-related notices go here.  In particular, any security
-vulnerabilities closed should be noted here rather than in the
-L</Selected Bug Fixes> section.
-
-[ List each security issue as a =head2 entry ]
-
 =head1 Incompatible Changes
 
-XXX For a release on a stable branch, this section aspires to be:
-
-    There are no changes intentionally incompatible with 5.XXX.XXX
-    If any exist, they are bugs, and we request that you submit a
-    report.  See L</Reporting Bugs> below.
-
-[ List each incompatible change as a =head2 entry ]
-
 =head2 Assigning non-zero to C<$[> is fatal
 
 Setting L<< C<$[>|perlvar/$[ >> to a non-zero value has been deprecated since
@@ -70,7 +41,7 @@ handles:
 
 =item *
 
-all four functions only paid attention to the C<:utf8> flag, other
+All four functions only paid attention to the C<:utf8> flag.  Other
 layers were completely ignored, so a handle with
 C<:encoding(UTF-16LE)> layer would be treated as UTF-8.  Other layers,
 such as compression are completely ignored with or without the
@@ -112,311 +83,86 @@ throws an exception which advises use of C<File::Glob::bsd_glob()> instead.
 
 [perl #133586]
 
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
-=head2 Module removals
-
-XXX Remove this section if not applicable.
-
-The following modules will be removed from the core distribution in a
-future release, and will at that time need to be installed from CPAN.
-Distributions on CPAN which require these modules will need to list them as
-prerequisites.
-
-The core versions of these modules will now issue C<"deprecated">-category
-warnings to alert you to this fact.  To silence these deprecation warnings,
-install the modules in question from CPAN.
-
-Note that these are (with rare exceptions) fine modules that you are encouraged
-to continue to use.  Their disinclusion from core primarily hinges on their
-necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
-not usually on concerns over their design.
-
-=over
-
-=item XXX
-
-XXX Note that deprecated modules should be listed here even if they are listed
-as an updated module in the L</Modules and Pragmata> section.
-
-=back
-
-[ List each other deprecation as a =head2 entry ]
-
-=head1 Performance Enhancements
-
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
-
-[ List each enhancement as an =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
 =head1 Modules and Pragmata
 
-XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
-go here.  If Module::CoreList is updated, generate an initial draft of the
-following sections using F<Porting/corelist-perldelta.pl>.  A paragraph summary
-for important changes should then be added by hand.  In an ideal world,
-dual-life modules would have a F<Changes> file that could be cribbed.
-
-The list of new and updated modules is modified automatically as part of
-preparing a Perl release, so the only reason to manually add entries here is if
-you're summarising the important changes in the module update. (Also, if the
-manually-added details don't match the automatically-generated ones, the
-release manager will have to investigate the situation carefully.)
-
-[ Within each section, list entries as an =item entry ]
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX Remove this section if not applicable.
-
-=back
-
 =head2 Updated Modules and Pragmata
 
 =over 4
 
 =item *
 
-L<vars> has been upgraded from version 1.04 to 1.05.
-
-C<vars.pm> no longer disables non-vars strict when checking if strict
-vars is enabled.  [perl #130674]
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
+L<B> has been upgraded from version 1.74 to 1.75.
 
 =item *
 
-B::Debug is no longer distributed with the core distribution.  It remains
-available on CPAN.
+L<B::Concise> has been upgraded from version 1.003 to 1.004.
 
 =item *
 
-XXX
-
-=back
-
-=head1 Documentation
-
-XXX Changes to files in F<pod/> go here.  Consider grouping entries by
-file and be sure to link to the appropriate page, e.g. L<perlfunc>.
-
-=head2 New Documentation
-
-XXX Changes which create B<new> files in F<pod/> go here.
-
-=head3 L<XXX>
-
-XXX Description of the purpose of the new file here
-
-=head2 Changes to Existing Documentation
-
-We have attempted to update the documentation to reflect the changes
-listed in this document.  If you find any we have missed, send email
-to L<perlbug@perl.org|mailto:perlbug@perl.org>.
-
-XXX Changes which significantly change existing files in F<pod/> go here.
-However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
-section.
-
-Additionally, the following selected changes have been made:
-
-=head3 L<XXX>
-
-=over 4
+L<B::Deparse> has been upgraded from version 1.48 to 1.49.
 
 =item *
 
-XXX Description of the change here
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages.  For the complete list of
-diagnostic messages, see L<perldiag>.
-
-XXX New or changed warnings emitted by the core's C<C> code go here.  Also
-include any changes in L<perldiag> that reconcile it to the C<C> code.
-
-=head2 New Diagnostics
-
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
-
-=head3 New Errors
-
-=over 4
+L<bignum> has been upgraded from version 0.50 to 0.51.
 
 =item *
 
-XXX L<message|perldiag/"message">
-
-=back
-
-=head3 New Warnings
-
-=over 4
+L<bytes> has been upgraded from version 1.06 to 1.07.
 
 =item *
 
-XXX L<message|perldiag/"message">
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-XXX Changes (i.e. rewording) of diagnostic messages go here
-
-=over 4
+L<CPAN> has been upgraded from version 2.20-TRIAL to 2.21-TRIAL.
 
 =item *
 
-XXX Describe change here
-
-=back
-
-=head1 Utility Changes
-
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
-
-[ List utility changes as a =head2 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
-
-=head2 L<XXX>
-
-=over 4
+L<Devel::Peek> has been upgraded from version 1.27 to 1.28.
 
 =item *
 
-XXX
-
-=back
-
-=head1 Configuration and Compilation
-
-XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
-go here.  Any other changes to the Perl build process should be listed here.
-However, any platform-specific changes should be listed in the
-L</Platform Support> section, instead.
-
-[ List changes as an =item entry ].
-
-=over 4
+L<feature> has been upgraded from version 1.53 to 1.54.
 
 =item *
 
-XXX
-
-=back
-
-=head1 Testing
-
-XXX Any significant changes to the testing of a freshly built perl should be
-listed here.  Changes which create B<new> files in F<t/> go here as do any
-large changes to the testing harness (e.g. when parallel testing was added).
-Changes to existing files in F<t/> aren't worth summarizing, although the bugs
-that they represent may be covered elsewhere.
-
-XXX If there were no significant test changes, say this:
-
-Tests were added and changed to reflect the other additions and changes
-in this release.
-
-XXX If instead there were significant changes, say this:
-
-Tests were added and changed to reflect the other additions and
-changes in this release.  Furthermore, these significant changes were
-made:
-
-[ List each test improvement as an =item entry ]
-
-=over 4
+L<File::Copy> has been upgraded from version 2.33 to 2.34.
 
 =item *
 
-XXX
+L<File::Glob> has been upgraded from version 1.31 to 1.32.
 
-=back
-
-=head1 Platform Support
-
-XXX Any changes to platform support should be listed in the sections below.
-
-[ Within the sections, list each platform as an =item entry with specific
-changes as paragraphs below it. ]
-
-=head2 New Platforms
-
-XXX List any platforms that this version of perl compiles on, that previous
-versions did not.  These will either be enabled by new files in the F<hints/>
-directories, or new subdirectories and F<README> files at the top level of the
-source tree.
-
-=over 4
+=item *
 
-=item XXX-some-platform
+L<Module::CoreList> has been upgraded from version 5.20180920 to 5.20181020.
 
-XXX
+=item *
 
-=back
+L<sigtrap> has been upgraded from version 1.08 to 1.09.
 
-=head2 Discontinued Platforms
+=item *
 
-XXX List any platforms that this version of perl no longer compiles on.
+L<Unicode::UCD> has been upgraded from version 0.71 to 0.72.
 
-=over 4
+=item *
 
-=item XXX-some-platform
+L<vars> has been upgraded from version 1.04 to 1.05.
 
-XXX
+C<vars.pm> no longer disables non-vars strict when checking if strict
+vars is enabled.  [perl #130674]
 
 =back
 
-=head2 Platform-Specific Notes
-
-XXX List any changes for specific platforms.  This could include configuration
-and compilation changes or changes in portability/compatibility.  However,
-changes within modules for platforms should generally be listed in the
-L</Modules and Pragmata> section.
+=head2 Removed Modules and Pragmata
 
 =over 4
 
-=item XXX-some-platform
+=item *
 
-XXX
+B::Debug is no longer distributed with the core distribution.  It remains
+available on CPAN.
 
 =back
 
 =head1 Internal Changes
 
-XXX Changes which affect the interface available to C<XS> code go here.  Other
-significant internal changes for future core maintainers should be noted as
-well.
-
-[ List each change as an =item entry ]
-
 =over 4
 
 =item *
@@ -429,11 +175,6 @@ the number of parenthetical capture groups.
 
 =head1 Selected Bug Fixes
 
-XXX Important bug fixes in the core language are summarized here.  Bug fixes in
-files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
-
-[ List each fix as an =item entry ]
-
 =over 4
 
 =item *
@@ -445,45 +186,50 @@ zero-length SV produced.  [perl #132655]
 
 Improve the debugging output for calloc() calls with C<-Dm>.  [perl #133439]
 
-=back
-
-=head1 Known Problems
-
-XXX Descriptions of platform agnostic bugs we know we can't fix go here.  Any
-tests that had to be C<TODO>ed for the release would be noted here.  Unfixed
-platform specific bugs also go here.
-
-[ List each fix as an =item entry ]
+=item *
 
-=over 4
+Regexp script runs were failing to permit ASCII digits in some cases.
+[perl #133547]
 
 =item *
 
-XXX
+On Unix-like systems supporting a platform-specific technique for
+determining L<< C<$^X>|perlvar/$^X >>, Perl failed to fall back to the
+generic technique when the platform-specific one fails (for example, a Linux
+system with /proc not mounted).  This was a regression in Perl 5.28.0.
+[perl #133573]
 
 =back
 
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
+=head1 Acknowledgements
 
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
+Perl 5.29.4 represents approximately 4 weeks of development since Perl
+5.29.3 and contains approximately 8,400 lines of changes across 180 files
+from 17 authors.
 
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 6,300 lines of changes to 110 .pm, .t, .c and .h files.
 
-=head1 Obituary
+Perl continues to flourish into its fourth decade thanks to a vibrant
+community of users and developers. The following people are known to have
+contributed the improvements that became Perl 5.29.4:
 
-XXX If any significant core contributor or member of the CPAN community has
-died, add a short obituary here.
+Aaron Crane, Alexandr Savca, Andreas König, Chris 'BinGOs' Williams, Craig
+A. Berry, Dagfinn Ilmari Mannsåker, David Mitchell, Eugen Konkov, James E
+Keenan, John SJ Anderson, Karl Williamson, Matthias Bethke, Nicolas R.,
+Sisyphus, Slaven Rezic, Tomasz Konojacki, Tony Cook.
 
-=head1 Acknowledgements
+The list above is almost certainly incomplete as it is automatically
+generated from version control history. In particular, it does not include
+the names of the (very much appreciated) contributors who reported issues to
+the Perl bug tracker.
 
-XXX Generate this with:
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
 
-  perl Porting/acknowledgements.pl v5.29.3..HEAD
+For a more complete list of all of Perl's historical contributors, please
+see the F<AUTHORS> file in the Perl source distribution.
 
 =head1 Reporting Bugs